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Guide to Play The Best Online Slots for Real Money at Online Casino 2021

There is of course nothing wrong with playing for fun, but real money slots give that little extra thrill. Not only does playing for real money give you a chance to win a nice amount of money, but you can also take advantage of nice bonuses on top of your deposit. With dozens of software providers and thousands of slots to win, it can be hard to know where to start. We are here to help you get started.

With an average of 1390 slot machines per online casino website, you are guaranteed hours of gaming fun. Whether you are looking for a fruit machine or a video slot machine, search and you will find. To help you in your search, we have already listed the five best free slot machines for you to read below and you can also find more information about online slots here.

In fact, once you get the hang of it, online slot machines allow you to make nice profits without even having to get off the couch. We went in search of online casinos where you can find the best real money slot machines. We found out how to recognize reliable online slots and what to look out for when using slot machines. We also give some useful tips and tricks to take home the jackpot!

The Top 5 Free Slot Machines with a High RTP

When you first wade into the world of online slot machines, it can take some getting used to. Therefore, it never hurts to practice playing some slot machines for free. These slot machines are from different developers and all have unique features, so you can practice with different game modes and decide which one suits you best. Would you prefer a slot machine with big bank earnings? Then check out a list of the best slot machines with high RTP below. This means that these slot machines pay out more than other machines:

No. Slots Software RTP
1 Goblin’s Cave Playtech 99.3%
2 Ocean Princess Playtech 99.1%
3 Ugga Bugga Playtech 99.07%
4 Nemo’s Voyage WMS 99%
5 Mega Joker NetEnt 99%

Now that you know which slot machines have the highest RTP, it’s time to try them out. Do you already have your eye on a specific machine? Or are you just browsing around? Whatever it is, we can guarantee you’ll have a great experience. Read on for an explanation of the types of slot machines on the market and how best to get started playing.

These are the best online slots for real money

We searched each gambling site for the best online slots for money, and wrote a review for our top 5 online slots:

Book Of Ra from Novomatic

Book of Ra takes you back to Ancient Egypt. This slot machine is particularly popular because it is very easy to understand and not so “flashy”. Online slots are of course also a game of patience, so it’s good if you can hold out for a while. Book of Ra has only 10 pay lines, which is not that much. You won’t get a win anytime soon, but once you get a prize, it’s always a nice pot. The maximum payout is $50,000 with an RTP of 95.5%.

Wheel Of Fortune from IGT

For those who know the TV show, Wheel Of Fortune needs no explanation. But maybe the slot machine is even more fun than the TV show because this version has a whopping 720 ways (!) to win. Although the max payout is $250,000, payouts are usually not very high, but they are frequent. Combine that with the fun theme and the picture is complete.

Thunderstruck II from Microgaming

Thunderstruck is already on its second version and is one of the most popular online slots on the market. Based on Scandinavian gods like Thor, Thunderstruck II is known for its numerous bonus rounds and multipliers. This ensures that this slot machine pays out regularly and your prize money can suddenly increase significantly. Thunderstruck II can be played on both PC and mobile and thanks to the beautiful design, it does not disappoint. You play with an RTP of 96.65% and for a jackpot of $250,000.

Triple Diamond from IGT

If you like simple slot machines, then Triple Diamond is totally your thing. This classic online slot machine has only 3 reels and 9 pay lines, making it quick to learn and easy to follow. The game has many multipliers that can increase your prize money, but then again it has few bonus rounds. This ‘classic’ has an RTP of 95.06%.

Wizard Of Oz from WMS

The movie Wizard Of Oz is already a classic, but the online slot machine is well on its way to becoming one as well. The movie theme and soundtrack add a nice dimension to this slot machine. The game itself is not very complex (3 reels with 30 pay lines), but it does move very fast. This slot is specially designed for mobile gamers, so it works very smoothly on your smartphone. Also, the RTP of 95.99% and a max payout of $50,000 make it worth giving Wizard Of Oz a try.

What are Different Types of Online Casino slots?

  • The Classic: This game machine has 3 slots and uses traditional symbols such as cherries, gold bars, and bells.
  • The Fruit Slots: these consist only of multiple fruits and have about 3 to 5 slots. They are simple and can be found almost in every casino.
  • Video slots: these are the slot machines that you will find the most online. These are sometimes free, but often paid and offer more features, higher prizes, and fun bonus games.
  • 3D slots: these slot machines have actual 3D effects that bring the game to life. Wade enters the world of gambling and gets carried away with the story.
  • Mobile Slot Machines: These types of slot machines are specially designed for people with cell phones. Thus, you can enjoy a round of slot machines on any device.
  • Progressive machines: these machines increase the jackpot as you and others bet more. This way you can win more and more.

In addition, you can often find slot machines with different icons. These are often derived from the classic version of the free slots site.

The Beginner’s Guide to Online Slot Machines

Before you start playing with online slot machines, it is important to know how they work and how you can get the most benefit for yourself. We will explain to you all about it here. From the software systems to how to play.

If you plan to play on online slots for money, it is important that you are well informed about how to use them. Using real money on online slots obviously carries certain risks. Therefore, we created this guide for players to gamble with money on online slot machines. In this guide you will find:

  • Advantages and disadvantages of slot machines with real money
  • How to play online slots
  • What payment options are available on gambling sites
  • What you can win with online slots
  • The difference between free slots and real money slots
  • Useful tips and tricks

The difference between real money online slots and free slots

1.    Payouts

The big difference between real money online slot machines and free slots is, of course, that with a free slot machine you cannot be paid out.

2.    Do free slot machines have a lower RTP?

It is sometimes claimed that free online slots have a higher RTP than slots with real money. This would be because people can then test out the slot machines for free and be attracted, but will earn less if they later play the same slot machine with real money.

3.    Design and gameplay

Because paying slots to bring in more money for developers, there is often a distinct difference in the design and gameplay of free or paying online slots. Real money slots often have more bonuses, multipliers, and options, and generally look better too.

4.    The difference in risk

With free online slot machines, there is no risk of losing money. So this is an excellent way to entertain yourself, but also to get to know the slots before playing with real money. If you feel you are addicted, seek help as soon as possible.

The features and components of free slot machines

Free slot machines each have unique features. Yet they also have much in common when one looks at the basics of each game. For example, there are a number of terms and features that recur in each game. We have written out the most important ones for you here so that you know immediately what it is all about and how it works. We wish you a lot of fun.

  • Symbols. Each machine has about 7 to 20+ different symbols which often include bonus symbols such as: “bonus”, “wild” and “scatter”. These symbols can provide a win or a loss in certain combinations.
  • Win Lines. These are the lines that determine whether you win a prize. Not only one straight line through the middle can win, as there are several combinations that can lead to prizes. If there are matching symbols on one or more lines, you have a prize. Some additional symbols such as “bonus” can also provide nice prizes.
  • Jackpot. Each turn the jackpot builds until someone wins it. Who knows, it might be you. The jackpot is the prize you can win.
  • Bonus round. With some combinations, you win bonus rounds. These rounds you can spin again for free.
  • Autoplay. By autoplay means automatic betting. This way you don’t have to press the betting button every turn, you can just keep playing until you don’t feel like it anymore.
  • Multipliers. These symbols double the winnings of the current game. This way you can win even more prize money.
  • Free spins. This feature allows you to take advantage of free spins without having to put down anything extra.

The terms and components of the slot machines are in many cases the same, but with each model, they are implemented and applied in a different way. How this works, you can read in the description of each individual machine. Now, it’s nice to know all these terms, but how are they actually used? You can read that below at the step-by-step guide to playing free slots online.

Playing online slots for money: step by step

With this step-by-step plan, we’ll teach you how to play online with real money without any worries.

  1. Choose a gambling site. If you want to gamble money online, we recommend that you research the gambling site carefully.
  2. First, take a good look at how each slot machine works, what symbols there are, and what the payout line is (what symbols you need to collect to have a prize).
  3. Look at the RTP and variance.
  4. Play the demo version and learn how the slot works before playing with real money.
  5. Ready for the real thing? Spin the reel!
  6. Bonus tip: stop playing in time. Don’t risk losing large sums of money and stop playing in time. Do not bet more than 10% of your total budget per game.

How to play free slot machines?

Playing free slots is not that difficult at all. You can easily try out a number of free machines after which you will proceed to an official casino website to further make use of the free money slots there. Here is a short step-by-step guide:

  1. Choose the game you want to play.
  2. Click “Play Now” on any game.
  3. Click on “Free Play.”
  4. Wait for the game to load. Make sure you give the Flash Player permission.
  5. Read through the rules of the game.
  6. Enter your bet.
  7. Choose “autoplay” mode or manual mode.
  8. Enjoy the game!

How do slot machines work?

Slot machines work on the basis of different reels with icons. The number of reels is often between 3 and 5, but there are also machines with as many as 7 or 9 reels. These machines contain a program that sets the reels in motion when a payment of a certain value is received. Normally, gambling machines are checked before they are allowed to be placed anywhere. This check takes place to see if the slot machine actually works at random, just like a die.

In physical slot machines, payment works via coin, chip coins, and sometimes bill money. Online slot machines often work with various payment methods such as iDeal, Credit Card, PayPal, and more. Each slot machine has individual features that make the game unique, such as certain characters or bonus rounds. They make the game extra interesting. Read more about the pros and cons of free slot machines below.

Advantages and disadvantages of online slot machines with real money


  • It is more exciting than free slots because you are playing for real money.
  • Due to the high RTP, you will receive high payouts online compared to a real casino.
  • You often get free bonuses like free spins, free play money.
  • The stakes are flexible, so you can often choose how much you want to play for.
  • There is an extensive choice of types of slot machines.


  • There is a risk of addiction.
  • A payout can take a long time.
  • You could potentially lose money.

Advantages and disadvantages of free slot machines


  • No stake: the game is free and stays free. Thus, you don’t have to spend anything on it.
  • Often you can just play the game in the browser and you don’t need to download anything for it.
  • It’s completely noncommittal. You are not tied to anything.
  • An ideal way to practice for the paid games.


  • The chances are slim that you can win actual prizes. They are most likely fictitious and good for practice.
  • Gambling often involves a lot of emotions, especially when you lose money. Fortunately, with a free gambling game, this is not the case and you can continue playing with peace of mind.

Of course, to make gambling the most enjoyable experience possible, we won’t let you go without providing a few tips for gambling online on a free slot machine. Read through them quickly below.

Platforms for the mobile players

Most mobile free slots can be downloaded on both Android and iOS phones, and some of them work fine on Windows phones as well. And of course, you also have slots for the tablet if you prefer to use it. If you have a good internet browser on your device, you can find plenty of online casinos on there too.

So you no longer have to sit at your laptop/computer to play, but can do it from anywhere, such as on the train, in your break at work, or during a picnic. Both mobile and desktop casinos run on software and other programs. Each one has its own favorite in this way. Would you like to know more about them?

Advantages of real money online slots for mobile:

  • You can play the mobile slots anytime, anywhere, as long as you have a stable internet connection. This makes it an excellent way to pass the time when you have to wait somewhere. Maybe you’ll win a big jackpot while you’re on the train.
  • When you download a slot machine app from the PlayStore or AppStore, you will immediately see the reviews from other users, for that particular slot machine.
  • Some online casinos offer special bonuses for real money online slots on mobile.

Recommended payment methods to play with real money on online slots

You can use different payment methods when playing real money online slots. There is a difference between each payment method, so the best choice depends on a number of things. You need to know this before choosing an online casino:

  • Not every payment method is accepted in every online casino.
  • Some payment methods have a deposit time.
  • Payments take a few days with some payment methods.
  • Some payment methods have a deposit and/or withdrawal limits.
  • You cannot collect and/or be paid out with every payment method.

Each payment method has its own way of working. This is an overview of popular payment methods when gambling with money online:

  • Credit cards: this deposit or receive money directly into your bank account.
  • ATM card: this is also directly connected to your bank account, but ensures that you cannot go below zero.
  • Bank transfer: these transfers may take a little longer.
  • Prepaid cards: these cards you can charge yourself first to protect yourself from debt.
  • eWallets: an electronic wallet you can also change yourself first.
  • Crypto: in some online casinos you can even pay with cryptocurrencies like Bitcoin.

First of all, it is important to distinguish between deposit methods and withdrawal methods. A deposit method allows you to top up your balance on an online gambling site with real money. A withdrawal method is a way to receive your payouts when you have won money on an online slot machine, for example.

Software and Online Slots

For both online and physical slot machines, you need software to make the game work properly. In addition, the software also determines how the game looks. Some of the more popular software developers are:

  • NetEnt: they provide a high-quality casino experience. This company from both Sweden and Malta ensures that the customer has a flawless experience while playing online with extra nice graphics.
  • Microgaming: it is best known for its poker network, but also develops online casinos around the world.
  • Play’N GO: this company provides games with great detail, which makes your time online extra fun. Also, this company provides easy accessibility to cell phones.
  • Quickspin: Quickspin makes many elaborate video slots that are suitable for both mobile and desktop computers. Using talented artists, they create great graphics for each slot.
  • Yggdrasil: Yggdrasil has been making gaming for desktop and mobile since 2013. In 2019, they were awarded “Innovator of the Year”.

Per game, there are also different bonuses. This depends not only on the software provider but also on the casino itself. Read more about it here.

Slot machine bonus rounds

Almost all slot machines have bonus rounds. These rounds make the game more interesting and, when you win, often give you an extra (cash) prize. The bonuses also help to keep players playing longer and keep them coming back to the casino’s website.

A bonus round can promise a lot of winnings, but sometimes other prizes like free spins, play credits, and more. Almost all slots give bonus rounds, but some have a better offer than others, which in turn makes them more attractive to the player.

Real money jackpots in online slots

Gambling online with real money can be fun, but it’s only really fun when you can take home the jackpot! Do you want to play an online slot machine and are you looking for a big jackpot? Then a progressive jackpot is for you.

A progressive jackpot is a jackpot that grows larger each time the game is played, but the jackpot is not won. Only when the jackpot is won does the entire game reset to its initial value. In some online slots, a progressive jackpot can even reach several million in real money.

In October 2015, Briton Jon Heywood won the biggest online progressive jackpot ever. He played through Betway on Microgaming’s online slot machine ‘Mega Moolah’, and won a whopping $17,879,645.

Tips for Free Slots Play

Have you become curious about free slot machines? Then we have a few tips here before you start:

  • Read the game rules and laws carefully first. Even with free games, it is better to be well informed than to have to figure everything out yourself.
  • Read reviews. Even the free games can turn out nasty. When a game has good reviews, it is often much more reliable.
  • Don’t play for too long. Even free slot machines can be addictive. Agree on a maximum time that you can play. After that, stop for that day.
  • Try out different types of slot machines. This way you will find out immediately which games you like better.
  • Use a reliable provider. There are many shady websites that promise a lot but deliver nothing.

Prepare yourself well if you are going to gamble online with real money

Real-money slots are just plain fun. But we can’t stress strongly enough how important it is to always use common sense, so you don’t get addicted, lose money, or get scammed.

So prepare yourself well if you want to gamble with money online. Don’t just research the website of the online casino itself, but also look closely at each slot machine before playing on it. Learn the rules, the pay lines, RTP, and so on. This way you can be sure that you will enjoy playing and reduce the risk as much as possible.

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